/
main.c
392 lines (334 loc) · 12.9 KB
/
main.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/*
* This file is part of the TREZOR project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <sys/types.h>
#include "common.h"
#include "mpu.h"
#include "image.h"
#include "flash.h"
#include "display.h"
#include "mini_printf.h"
#include "rng.h"
#include "secbool.h"
#include "touch.h"
#include "usb.h"
#include "version.h"
#include "bootui.h"
#include "messages.h"
// #include "mpu.h"
const uint8_t BOOTLOADER_KEY_M = 2;
const uint8_t BOOTLOADER_KEY_N = 3;
static const uint8_t * const BOOTLOADER_KEYS[] = {
(const uint8_t *)"\xc2\xc8\x7a\x49\xc5\xa3\x46\x09\x77\xfb\xb2\xec\x9d\xfe\x60\xf0\x6b\xd6\x94\xdb\x82\x44\xbd\x49\x81\xfe\x3b\x7a\x26\x30\x7f\x3f",
(const uint8_t *)"\x80\xd0\x36\xb0\x87\x39\xb8\x46\xf4\xcb\x77\x59\x30\x78\xde\xb2\x5d\xc9\x48\x7a\xed\xcf\x52\xe3\x0b\x4f\xb7\xcd\x70\x24\x17\x8a",
(const uint8_t *)"\xb8\x30\x7a\x71\xf5\x52\xc6\x0a\x4c\xbb\x31\x7f\xf4\x8b\x82\xcd\xbf\x6b\x6b\xb5\xf0\x4c\x92\x0f\xec\x7b\xad\xf0\x17\x88\x37\x51",
// comment the lines above and uncomment the lines below to use a custom signed vendorheader
// (const uint8_t *)"\xd7\x59\x79\x3b\xbc\x13\xa2\x81\x9a\x82\x7c\x76\xad\xb6\xfb\xa8\xa4\x9a\xee\x00\x7f\x49\xf2\xd0\x99\x2d\x99\xb8\x25\xad\x2c\x48",
// (const uint8_t *)"\x63\x55\x69\x1c\x17\x8a\x8f\xf9\x10\x07\xa7\x47\x8a\xfb\x95\x5e\xf7\x35\x2c\x63\xe7\xb2\x57\x03\x98\x4c\xf7\x8b\x26\xe2\x1a\x56",
// (const uint8_t *)"\xee\x93\xa4\xf6\x6f\x8d\x16\xb8\x19\xbb\x9b\xeb\x9f\xfc\xcd\xfc\xdc\x14\x12\xe8\x7f\xee\x6a\x32\x4c\x2a\x99\xa1\xe0\xe6\x71\x48",
};
#define USB_IFACE_NUM 0
static void usb_init_all(void) {
static const usb_dev_info_t dev_info = {
.device_class = 0x00,
.device_subclass = 0x00,
.device_protocol = 0x00,
.vendor_id = 0x1209,
.product_id = 0x53C0,
.release_num = 0x0200,
.manufacturer = "SatoshiLabs",
.product = "TREZOR",
.serial_number = "000000000000000000000000",
.interface = "TREZOR Interface",
.usb21_enabled = sectrue,
.usb21_landing = sectrue,
};
static uint8_t rx_buffer[USB_PACKET_SIZE];
static const usb_webusb_info_t webusb_info = {
.iface_num = USB_IFACE_NUM,
.ep_in = USB_EP_DIR_IN | 0x01,
.ep_out = USB_EP_DIR_OUT | 0x01,
.subclass = 0,
.protocol = 0,
.max_packet_len = sizeof(rx_buffer),
.rx_buffer = rx_buffer,
.polling_interval = 1,
};
usb_init(&dev_info);
ensure(usb_webusb_add(&webusb_info), NULL);
usb_start();
}
static secbool bootloader_usb_loop(const vendor_header * const vhdr, const image_header * const hdr)
{
usb_init_all();
uint8_t buf[USB_PACKET_SIZE];
for (;;) {
int r = usb_webusb_read_blocking(USB_IFACE_NUM, buf, USB_PACKET_SIZE, USB_TIMEOUT);
if (r != USB_PACKET_SIZE) {
continue;
}
uint16_t msg_id;
uint32_t msg_size;
if (sectrue != msg_parse_header(buf, &msg_id, &msg_size)) {
// invalid header -> discard
continue;
}
switch (msg_id) {
case 0: // Initialize
process_msg_Initialize(USB_IFACE_NUM, msg_size, buf, vhdr, hdr);
break;
case 1: // Ping
process_msg_Ping(USB_IFACE_NUM, msg_size, buf);
break;
case 5: // WipeDevice
ui_fadeout();
ui_screen_wipe_confirm();
ui_fadein();
int response = ui_user_input(INPUT_CONFIRM | INPUT_CANCEL);
if (INPUT_CANCEL == response) {
ui_fadeout();
ui_screen_info(secfalse, vhdr, hdr);
ui_fadein();
send_user_abort(USB_IFACE_NUM, "Wipe cancelled");
break;
}
ui_fadeout();
ui_screen_wipe();
ui_fadein();
r = process_msg_WipeDevice(USB_IFACE_NUM, msg_size, buf);
if (r < 0) { // error
ui_fadeout();
ui_screen_fail();
ui_fadein();
usb_stop();
usb_deinit();
return secfalse; // shutdown
} else { // success
ui_fadeout();
ui_screen_done(0, sectrue);
ui_fadein();
usb_stop();
usb_deinit();
return secfalse; // shutdown
}
break;
case 6: // FirmwareErase
process_msg_FirmwareErase(USB_IFACE_NUM, msg_size, buf);
break;
case 7: // FirmwareUpload
r = process_msg_FirmwareUpload(USB_IFACE_NUM, msg_size, buf);
if (r < 0 && r != -4) { // error, but not user abort (-4)
ui_fadeout();
ui_screen_fail();
ui_fadein();
usb_stop();
usb_deinit();
return secfalse; // shutdown
} else
if (r == 0) { // last chunk received
ui_screen_install_progress_upload(1000);
ui_fadeout();
ui_screen_done(4, sectrue);
ui_fadein();
ui_screen_done(3, secfalse);
hal_delay(1000);
ui_screen_done(2, secfalse);
hal_delay(1000);
ui_screen_done(1, secfalse);
hal_delay(1000);
usb_stop();
usb_deinit();
ui_fadeout();
return sectrue; // jump to firmware
}
break;
case 55: // GetFeatures
process_msg_GetFeatures(USB_IFACE_NUM, msg_size, buf, vhdr, hdr);
break;
default:
process_msg_unknown(USB_IFACE_NUM, msg_size, buf);
break;
}
}
}
secbool load_vendor_header_keys(const uint8_t * const data, vendor_header * const vhdr)
{
return load_vendor_header(data, BOOTLOADER_KEY_M, BOOTLOADER_KEY_N, BOOTLOADER_KEYS, vhdr);
}
static secbool check_vendor_keys_lock(const vendor_header * const vhdr) {
uint8_t lock[FLASH_OTP_BLOCK_SIZE];
ensure(flash_otp_read(FLASH_OTP_BLOCK_VENDOR_KEYS_LOCK, 0, lock, FLASH_OTP_BLOCK_SIZE), NULL);
if (0 == memcmp(lock, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", FLASH_OTP_BLOCK_SIZE)) {
return sectrue;
}
uint8_t hash[32];
vendor_keys_hash(vhdr, hash);
return sectrue * (0 == memcmp(lock, hash, 32));
}
// protection against bootloader downgrade
#if PRODUCTION
static void check_bootloader_version(void)
{
uint8_t bits[FLASH_OTP_BLOCK_SIZE];
for (int i = 0; i < FLASH_OTP_BLOCK_SIZE * 8; i++) {
if (i < VERSION_MONOTONIC) {
bits[i / 8] &= ~(1 << (7 - (i % 8)));
} else {
bits[i / 8] |= (1 << (7 - (i % 8)));
}
}
ensure(flash_otp_write(FLASH_OTP_BLOCK_BOOTLOADER_VERSION, 0, bits, FLASH_OTP_BLOCK_SIZE), NULL);
uint8_t bits2[FLASH_OTP_BLOCK_SIZE];
ensure(flash_otp_read(FLASH_OTP_BLOCK_BOOTLOADER_VERSION, 0, bits2, FLASH_OTP_BLOCK_SIZE), NULL);
ensure(sectrue * (0 == memcmp(bits, bits2, FLASH_OTP_BLOCK_SIZE)), "Bootloader downgraded");
}
#endif
int main(void)
{
mpu_config_bootloader();
main_start:
display_clear();
#if PRODUCTION
check_bootloader_version();
#endif
touch_init();
touch_power_on();
// delay to detect touch
uint32_t touched = 0;
for (int i = 0; i < 100; i++) {
touched = touch_is_detected() | touch_read();
if (touched) {
break;
}
hal_delay(1);
}
vendor_header vhdr;
image_header hdr;
secbool firmware_present;
// detect whether the devices contains a valid firmware
firmware_present = load_vendor_header_keys((const uint8_t *)FIRMWARE_START, &vhdr);
if (sectrue == firmware_present) {
firmware_present = check_vendor_keys_lock(&vhdr);
}
if (sectrue == firmware_present) {
firmware_present = load_image_header((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen), FIRMWARE_IMAGE_MAGIC, FIRMWARE_IMAGE_MAXSIZE, vhdr.vsig_m, vhdr.vsig_n, vhdr.vpub, &hdr);
}
if (sectrue == firmware_present) {
firmware_present = check_image_contents(&hdr, IMAGE_HEADER_SIZE + vhdr.hdrlen, firmware_sectors, FIRMWARE_SECTORS_COUNT);
}
// start the bootloader if no or broken firmware found ...
if (firmware_present != sectrue) {
// show intro animation
// no ui_fadeout(); - we already start from black screen
ui_screen_first();
ui_fadein();
hal_delay(1000);
ui_fadeout();
ui_screen_second();
ui_fadein();
hal_delay(1000);
ui_fadeout();
ui_screen_third();
ui_fadein();
// erase storage
static const uint8_t sectors_storage[] = {
FLASH_SECTOR_STORAGE_1,
FLASH_SECTOR_STORAGE_2,
};
ensure(flash_erase_sectors(sectors_storage, sizeof(sectors_storage), NULL), NULL);
// and start the usb loop
if (bootloader_usb_loop(NULL, NULL) != sectrue) {
return 1;
}
} else
// ... or if user touched the screen on start
if (touched) {
// show firmware info with connect buttons
// no ui_fadeout(); - we already start from black screen
ui_screen_info(sectrue, &vhdr, &hdr);
ui_fadein();
for (;;) {
int response = ui_user_input(INPUT_CONFIRM | INPUT_CANCEL | INPUT_INFO);
ui_fadeout();
// if cancel was pressed -> restart
if (INPUT_CANCEL == response) {
goto main_start;
}
// if confirm was pressed -> jump out
if (INPUT_CONFIRM == response) {
// show firmware info without connect buttons
ui_screen_info(secfalse, &vhdr, &hdr);
ui_fadein();
break;
}
// if info icon was pressed -> show fingerprint
if (INPUT_INFO == response) {
// show fingerprint
ui_screen_info_fingerprint(&hdr);
ui_fadein();
while (INPUT_LONG_CONFIRM != ui_user_input(INPUT_LONG_CONFIRM)) { }
ui_fadeout();
ui_screen_info(sectrue, &vhdr, &hdr);
ui_fadein();
}
}
// and start the usb loop
if (bootloader_usb_loop(&vhdr, &hdr) != sectrue) {
return 1;
}
}
ensure(
load_vendor_header_keys((const uint8_t *)FIRMWARE_START, &vhdr),
"invalid vendor header");
ensure(
check_vendor_keys_lock(&vhdr),
"unauthorized vendor keys");
ensure(
load_image_header((const uint8_t *)(FIRMWARE_START + vhdr.hdrlen), FIRMWARE_IMAGE_MAGIC, FIRMWARE_IMAGE_MAXSIZE, vhdr.vsig_m, vhdr.vsig_n, vhdr.vpub, &hdr),
"invalid firmware header");
ensure(
check_image_contents(&hdr, IMAGE_HEADER_SIZE + vhdr.hdrlen, firmware_sectors, FIRMWARE_SECTORS_COUNT),
"invalid firmware hash");
// if all VTRUST flags are unset = ultimate trust => skip the procedure
if ((vhdr.vtrust & VTRUST_ALL) != VTRUST_ALL) {
// ui_fadeout(); // no fadeout - we start from black screen
ui_screen_boot(&vhdr, &hdr);
ui_fadein();
int delay = (vhdr.vtrust & VTRUST_WAIT) ^ VTRUST_WAIT;
if (delay > 1) {
while (delay > 0) {
ui_screen_boot_wait(delay);
hal_delay(1000);
delay--;
}
} else if (delay == 1) {
hal_delay(1000);
}
if ((vhdr.vtrust & VTRUST_CLICK) == 0) {
ui_screen_boot_click();
touch_click();
}
ui_fadeout();
}
// mpu_config_firmware();
// jump_to_unprivileged(FIRMWARE_START + vhdr.hdrlen + IMAGE_HEADER_SIZE);
mpu_config_off();
jump_to(FIRMWARE_START + vhdr.hdrlen + IMAGE_HEADER_SIZE);
return 0;
}